Document Detail

Superior fatigue resistance of elite black South African distance runners.
MedLine Citation:
PMID:  8282637     Owner:  NLM     Status:  MEDLINE    
Black athletes currently dominate long-distance running events in South Africa. In an attempt to explain an apparently superior running ability of black South African athletes at distances > 3 km, we compared physiological measurements in the fastest 9 white and 11 black South African middle-to long-distance runners. Whereas both groups ran at a similar percentage of maximal O2 uptake (%VO2max) over 1.65-5 km, the %VO2max sustained by black athletes was greater than that of white athletes at distances > 5 km (P < 0.001). Although both groups had similar training volumes, black athletes reported that they completed more exercise at > 80% VO2max (36 +/- 18 vs. 14 +/- 7%: P < 0.005). When corrections were made for the black athletes' smaller body mass, their superior ability to sustain a high %VO2max could not be explained by any differences in VO2max, maximal ventilation, or submaximal running economy. Superior distance running performance of the black athletes was not due to a greater (+/- 50%) percentage of type I fibers but was associated with lower blood lactate concentrations during exercise. Time to fatigue during repetitive isometric muscle contractions was also longer in black runners (169 +/- 65 vs. 97 +/- 69 s; P < 0.05), but whether this observation explains the superior endurance or was due to the lower peak muscle strength (46.3 +/- 10.3 vs. 67.5 +/- 18.0 Nm/l lean thigh volume; P < 0.01) remains to be established.
P Coetzer; T D Noakes; B Sanders; M I Lambert; A N Bosch; T Wiggins; S C Dennis
Related Documents :
8091047 - Exercise-induced menstrual cycle changes. a functional, temporary adaptation to metabol...
15258317 - Effect of zinc supplementation on hematological parameters in athletes.
8282637 - Superior fatigue resistance of elite black south african distance runners.
11078087 - Effects of aging on cardiorespiratory responses to brief and intense intermittent exerc...
17964887 - Exercise therapy and other types of physical therapy for patients with neuromuscular di...
25035817 - Exercise awareness and barriers after spinal cord injury.
Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of applied physiology (Bethesda, Md. : 1985)     Volume:  75     ISSN:  8750-7587     ISO Abbreviation:  J. Appl. Physiol.     Publication Date:  1993 Oct 
Date Detail:
Created Date:  1994-02-14     Completed Date:  1994-02-14     Revised Date:  2013-09-26    
Medline Journal Info:
Nlm Unique ID:  8502536     Medline TA:  J Appl Physiol (1985)     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1822-7     Citation Subset:  IM    
Liberty Life Chair of Exercise and Sports Science, University of Cape Town Medical School, Observatory, South Africa.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
African Continental Ancestry Group
European Continental Ancestry Group
Exercise Test
Fatigue / physiopathology*
Isometric Contraction / physiology
Lactates / blood
Muscles / anatomy & histology,  physiology
Oxygen Consumption / physiology
Physical Endurance / physiology*
South Africa
Reg. No./Substance:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Interaction among cardiac, respiratory, and locomotor rhythms during cardiolocomotor synchronization...
Next Document:  Effects of age, adiposity, and fitness level on plasma catecholamine responses to standing and exerc...